'page' being set, but empty, is valid, and happens at the root of a

site.

@@ -7,7 +7,7 @@ export const getHtmlFromProps = (props) => {
   const { site, page, url, html } = props
   if (html) return { data: html }
   if (url) return getUrl(url)
-  if (site && page) return getSitePage(site, page)
+  if (site && page !== undefined) return getSitePage(site, page)
   return { data: null }
 }